Siemens SIMATIC S7-400 CP 440 - Figure 6-2 Time Sequence Chart for the 9 RECV

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Communication via Function Blocks

6.3 Using the Function Blocks

Point-to-point connection CP 440 Installation and Parameter Assignment

Manual, 09/2007, A5E00057742-03

Time Sequence Chart for the RECV_440 FB

The figure below illustrates the behavior of the NDR, LEN and ERROR parameters,

depending on how the EN_R and R inputs are wired.

(1B5

1'5

/(1

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(5525

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5HFHLYLQJ

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1RUHFHLSW

5(6(7

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5HFHLYLQJ

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5HFHLYLQJGLVDEOHG

Figure 6-2 Time Sequence Chart for the 9 RECV_440 FB

Note

The EN_R must be set to static "1". During the receive request, the EN_R parameter must

be supplied with RLO "1" (result of logic operation).

Siemens SIMATIC S7-400 CP 440 - Figure 6-2 Time Sequence Chart for the 9 RECV_440 FB